content/browser/renderer_host/input/input_ack_handler.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "content/browser/renderer_host/event_with_latency_info.h"
  10 #include "content/common/input/input_event_ack_state.h"
  11 #include "content/public/browser/native_web_keyboard_event.h"
  12 #include "third_party/WebKit/public/web/WebInputEvent.h"
  13
  14 namespace content {
  15
  16 // Provided customized ack response for input events.
  17 class CONTENT_EXPORT InputAckHandler {
  18  public:
  19   virtual ~InputAckHandler() {}
  20
  21   // Called upon event ack receipt from the renderer.
  22   virtual void OnKeyboardEventAck(const NativeWebKeyboardEvent& event,
  23                                   InputEventAckState ack_result) = 0;
  24   virtual void OnWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
  25                                InputEventAckState ack_result) = 0;
  26   virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
  27                                InputEventAckState ack_result) = 0;
  28   virtual void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
  29                                  InputEventAckState ack_result) = 0;
  30
  31   enum UnexpectedEventAckType {
  32     UNEXPECTED_ACK,
  33     UNEXPECTED_EVENT_TYPE,
  34     BAD_ACK_MESSAGE
  35   };
  36   virtual void OnUnexpectedEventAck(UnexpectedEventAckType type) = 0;
  37 };
  38
  39 } // namespace content
  40
  41 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_